Although Academician Wang Mengshu, Zhang Tianwang and others have already decided on preliminary plans, the heads of Haikou and Zhanjiang are still a little worried.

After all, the undersea tunnel must cross three seismic zones. Once a super strong earthquake occurs, it is easy to cause strata dislocation.

The person in charge of Haikou asked in a low voice: "Academician Wang, Dr. Zhang, if there is a super strong earthquake, will the tunnel be torn?"

Zhang Tianwang patiently explained: "Don't worry, the misalignment of the formation caused by earthquakes will at most displace the tunnel. However, since the tunnel adopts an integrated design, it will not tear a lot of tunnels, and there are also double pipelines. Even if it is a magnitude 9 earthquake, it will be difficult to tear the first layer of pipelines."

"But if..."

Academician Wang shook his head: "If the first layer of pipe is torn and the second layer of inner pipe is still there, the possibility of both layers being destroyed at the same time is close to zero."

"I have done supercomputing simulation calculations on super highways. Even if the displacement is over a hundred meters, I can rely on integrated design and its own strength to resist it." Academician Li Fen explained.

In fact, let alone the strata changes of hundreds of meters, even the strata displacement of more than ten meters is very rare in earthquakes.

On the contrary, large-scale landslides are prone to collapse on the surface, which is because there are no strata squeezed together around the mountain. Under the destruction of seismic waves and the influence of gravity, it is easy to collapse.

However, large displacements are often not prone to occur inside the strata, because it is difficult to produce large displacements by pressing them together.

This is like on a bus, when standing alone or squeezing with a bunch of people, the bus is also suddenly braked, and a bunch of people may fall, but a bunch is unlikely to fall.

As long as you avoid some easily broken strata when planning the tunnel route, you can actually avoid many dangers.

The concern of the person in charge of the two places is actually that he does not understand the seismic resistance principle of integrated tunnels.

Why do many modern buildings often find it difficult to ensure their integrity during major earthquakes?

The first reason is naturally that the materials are not good. The overall strength of reinforced concrete cannot withstand the high-frequency oscillation of earthquakes. The nanocomposite formed by ferrosilicon nanowires and silicate-sodium chloride has a strength of 3.4 to 3.6 times that of reinforced concrete.

This is like the comparison between an ordinary glass bottle and a silicon nanoglass bottle. There is a huge difference in strength between the two.

The second reason is that it appears in the design.

Usually buildings often contain three parts: foundation, frame and fill wall. Moreover, the combination of the internal frame is not completely connected in one piece, and is usually spliced ​​layer by layer.

Many people have played with Lego building blocks. To put it bluntly, modern architecture is an enlarged version of Lego building blocks. Even underground tunnels are also made up of building blocks.

This type of building block-style building is in a natural disadvantage when resisting vibrations.

The integrated building created by new materials is to some extent like a piece of iron.

In fact, you can do a comparison experiment, using building blocks and glue, and directly using plastic mesh and epoxy resin to create a pipe with the same pipe diameter. Under the same high-frequency oscillation, the pipes made of building blocks are definitely not as good as plastic mesh and epoxy resin.

After understanding the details, the responsible persons in both places felt relieved.

In the temporary conference room on the beach in Hai'an Town, a group of experts and scholars were discussing enthusiastically that no one had reached an agreement on the undersea tunnel route in the Qiongzhou Strait.

During this discussion, the time came to lunch time without realizing it. People from Xuwen County arranged lunch for everyone.

Lin Baijie and Jiang Hailin looked at the fried pineapple rice in front of them, the pineapple ginger meat and pineapple juice, and their stomachs became sour.

The person in charge of Xuwen County saw everyone's faces look embarrassed and explained a little embarrassedly: "This year, Xuwen pineapples are unsold, so our county can help digest some."

"Understand understanding." Lin Baijie took a few bites of pineapple fried rice, and then said, "How much does a pound of pineapple cost this year?"

"One kilogram is only one dollar, and there are not many dealers coming to collect it."

Jiang Hailin, who was standing aside, was surprised: "Although Xuwen's pineapple annual production is quite high, I read the industrial research report of Fengmin Agriculture. It said that we also bought a lot of pineapples from Nanbowan. Why is Xuwen's pineapple unsalable?"

The person in charge of Xuwen County smiled bitterly: "Those fruit shops say that the pineapples in Nanbowan are called pineapples, so the sales volume is very good. Our own is called pineapples, and we can't sell them for one dollar."

"There are great differences in the difficulty of pineapples, pineapples," Jiang Hailin asked in confusion.

The person in charge of Xuwen County shook his head: "The two are the same thing, there are only some different varieties, such as Bali, golden pineapple and so on."

After eating half a plate of pineapple fried rice, Lin Baijie said with a smile:

"It's really good to eat pineapple once a while. If you eat it frequently, you can't stand it. I'll call Fengmin's Lao Xiao later and ask him to arrange a cold chain truck and a cold chain cargo ship. Anyway, this year's longan lychee will go north, so it's not a big problem to add a pineapple."

Jiang Hailin nodded: "That's true. Xuwen produces 700,000 tons of pineapples annually. No one in the country can be divided into one, let alone it is not concentrated on the market."

"On behalf of the fruit farmers, I would like to express my gratitude to President Lin and President Jiang." The person in charge of Xuwen County was very excited. After all, the unsalable fruits in the county have always been a trouble for the local area.

After lunch, Academician Wang, Zhang Tianwang and others continued to discuss the undersea tunnel route in the Qiongzhou Strait.

At present, there are as many as seven planned routes that everyone has taken out, among which the shortest distance is from Hai'an Town, Xuwen to Haikou, Qiongzhou, with a length of only 19.5 kilometers.

This line has a short distance and the cost is only about 6.5 billion.

However, the opposition was the most important because the seismic zone of the Hai'an-Haikou line was the most concentrated, and the geological conditions in Haikou were not good.

Although the construction cost is cheap, in order to save money for a while, it will be a little bit more cost-effective in order to save safety hazards in the future.

Zhang Tianwang pointed to the exploration map and said, "If we look at it from the perspective of geology and construction, Line 4 is the best choice."

Line 4 is from Weijiao Township in Xuwen to Leigong Island in Linggao.

"Line 4 is indeed better, it's just a little too long, reaching 33 kilometers, and the cost is about 10.8 billion." Academician Wang was also a little confused.

After repeated consideration, everyone finally chose Line 4, which is the best safe, and went to Weijiao Township in Xuwen to Leigong Island in Lingao County.

As a party to the cooperation, the Suiren Group, Zhanjiang and Qiongzhou signed a memorandum of strategic cooperation, of which the Suiren Group invested 4 billion yuan and had a 12-year fee-based operation period for the undersea tunnel.

After determining the route, the next step is to design the details, as well as more in-depth field exploration, make plans for the undersea tunnel, and then send them to the project for approval.

Originally, this tunnel was only intended to be connected to the railway, but with the addition of the Suiren system, it was changed to a mix of highways and railways, and the cost did not increase much.

After all, the Qinghan Tunnel built by the Japanese is a living reference object.

After signing the cooperation memorandum, Lin Baijie and Jiang Hailin communicated with Xiao Yuan of Fengmin, and asked the other party to arrange personnel as soon as possible to settle in Xuwen County, acquire pineapple, lychee, and longan, and transport it to the north for sale through cold chain.
Chapter completed!